PC仪器(也称个人计算机仪器)是80年代以来,随着个人计算机在工程和科技领域中的广泛应用而发展起来的一类新的测试和测量系统。这类系统以个人计算机为基础,其基本测试和测量部件以附加插件或模块的形式插入PC的总线插槽或其扩展机箱中,仪器的显示和操作都由PC的显示器和键盘等完成。由于PC仪器充分利用了个人计算机的现有资源,许多在传统仪器中由硬件完成的功能改由软件实现,具有成本低、使用方便等特点,因而具有广阔的发展前景。本文涉及的PC仪器系统包括了数字多用表、可程控直流源、数字示波器和程控多路开关等仪器模块,这些仪器模块以插件的形式放在一个扩展机箱中,个 PC instrument (also called personal computer instrument) is a new type of testing and measuring system developed since the 1980s with the widespread application of personal computers in engineering and science and technology. Such systems are based on a personal computer with basic test and measurement components plugged into the PC’s bus slot or its expansion enclosure as additional add-ons or modules, and the display and operation of the instrument are performed by the PC’s display and keyboard. Because PC instrument fully utilizes the existing resources of personal computer, many functions accomplished by hardware in traditional instruments are changed by software, which has the characteristics of low cost and convenient use, and thus has broad development prospects. This article involves the PC instrumentation system includes digital multimeter, programmable DC source, digital oscilloscope and program-controlled multiplexers and other instrumentation modules, these instrumentation modules in the form of plug-in in an expansion chassis, a